Jegantha, the Wellspring + Horde of Notions + Concordant Crossroads + Phantom Train

Jegantha, the Wellspring

Horde of Notions

Concordant Crossroads

Phantom Train

How it works

1. Activate Jegantha by tapping it, adding that cannot be spent to pay generic mana costs.
2. Activate Phantom Train by sacrificing Jegantha.
3. Activate Horde of Notions by paying , causing you to cast Jegantha from your graveyard without paying its mana cost.
4. Repeat.

This loop turns Jegantha, the Wellspring into a self-sustaining engine by cycling it between the battlefield and the graveyard, producing infinite death triggers, enter-the-battlefield effects, and storm count along the way. Concordant Crossroads provides immediate haste so that Jegantha can tap the moment it re-enters play, leveraging its restriction-free color production to feed Horde of Notions's activation cost. Meanwhile, Phantom Train acts as the sacrifice outlet that bins Jegantha while growing itself with a +1/+1 counter, allowing Horde of Notions to immediately pull Jegantha right back out of the graveyard for free.